package day27;

import java.math.BigDecimal;
import java.util.Scanner;

/**
 * 题目：三角形
 * 题目链接：https://www.nowcoder.com/questionTerminal/c67a09062c0f4a5b964eef0945d3dd06
 */
public class Main1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            BigDecimal a = scanner.nextBigDecimal();
            BigDecimal b = scanner.nextBigDecimal();
            BigDecimal c = scanner.nextBigDecimal();
            if(a.add(b).compareTo(c) > 0 && b.add(c).compareTo(a) > 0 && a.add(c).compareTo(b) > 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
}
